// Copyright(c) 2016 Alexander Dalshov & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)

#pragma once

#if defined(_WIN32)

#include <spdlog/details/null_mutex.h>
#if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT)
#include <spdlog/details/os.h>
#endif
#include <spdlog/sinks/base_sink.h>

#include <mutex>
#include <string>

// Avoid including windows.h (https://stackoverflow.com/a/30741042)
#if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT)
extern "C" __declspec(dllimport) void __stdcall OutputDebugStringW(const wchar_t* lpOutputString);
#else
extern "C" __declspec(dllimport) void __stdcall OutputDebugStringA(const char* lpOutputString);
#endif
extern "C" __declspec(dllimport) int __stdcall IsDebuggerPresent();

namespace spdlog {
namespace sinks {
    /*
 * MSVC sink (logging using OutputDebugStringA)
 */
    template <typename Mutex> class msvc_sink : public base_sink<Mutex>
    {
    public:
        msvc_sink() = default;
        msvc_sink(bool check_debugger_present) : check_debugger_present_{check_debugger_present} {};

    protected:
        void sink_it_(const details::log_msg& msg) override
        {
            if (check_debugger_present_ && !IsDebuggerPresent())
            {
                return;
            }
            memory_buf_t formatted;
            base_sink<Mutex>::formatter_->format(msg, formatted);
            formatted.push_back('\0');  // add a null terminator for OutputDebugString
#if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT)
            wmemory_buf_t wformatted;
            details::os::utf8_to_wstrbuf(string_view_t(formatted.data(), formatted.size()), wformatted);
            OutputDebugStringW(wformatted.data());
#else
            OutputDebugStringA(formatted.data());
#endif
        }

        void flush_() override {}

        bool check_debugger_present_ = true;
    };

    using msvc_sink_mt = msvc_sink<std::mutex>;
    using msvc_sink_st = msvc_sink<details::null_mutex>;

    using windebug_sink_mt = msvc_sink_mt;
    using windebug_sink_st = msvc_sink_st;

}  // namespace sinks
}  // namespace spdlog

#endif
